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featureoverload
V2EX  ›  Python

升级 marshmallow,运行 pytest 的时候有大量 warning 怎么快速修改正确?

  •  
  •   featureoverload · 2021-12-07 14:08:12 +08:00 · 1170 次点击
    这是一个创建于 426 天前的主题,其中的信息可能已经有所发展或是发生改变。

    新版 marshmallow 将 Field 中,非保留的关键参数都建议放入到 metadata 参数中, 没有放入的会显示 warning 。

    示例代码:

    # schemas.py
    from marshmallow import Schema
    from marshmallow import fields
    
    
    class FooSchema(Schema):
        name = fields.String(
            required=True,
            title='foo',
            description='foo name')
        relationship = fields.String(
            title='bar', description='foobar')
    
    

    测试代码:

    from schemas import FooSchema
    
    
    def test_warn():
        INPUT = {
            'name': 'something',
            'relationship': 'others'
        }
        schema = FooSchema()
        data = schema.load(INPUT)
        assert data == INPUT
    
    

    示例代码文件结构:

    .
    ├── requirements.txt  # marshmallow==3.3.0
    ├── schemas.py
    └── test_warning.py
    

    升级 marshmallow:

    $ pip install -U marshmallow
    ...
    Successfully installed marshmallow-3.14.1
    

    使用 pytest 测试(出现 marshmallow warning ):

    pytest test_warning.py
    ================================================================ test session starts =================================================================
    platform darwin -- Python 3.8.3, pytest-6.2.5, py-1.11.0, pluggy-1.0.0
    rootdir: /private/tmp/_
    collected 1 item                                                                                                                                     
    
    test_warning.py .                                                                                                                              [100%]
    
    ================================================================== warnings summary ==================================================================
    .venv/lib/python3.8/site-packages/marshmallow/fields.py:218
      /private/tmp/_/.venv/lib/python3.8/site-packages/marshmallow/fields.py:218: RemovedInMarshmallow4Warning: Passing field metadata as keyword arguments is deprecated. Use the explicit `metadata=...` argument instead. Additional metadata: {'title': 'foo', 'description': 'foo name'}
        warnings.warn(
    
    .venv/lib/python3.8/site-packages/marshmallow/fields.py:218
      /private/tmp/_/.venv/lib/python3.8/site-packages/marshmallow/fields.py:218: RemovedInMarshmallow4Warning: Passing field metadata as keyword arguments is deprecated. Use the explicit `metadata=...` argument instead. Additional metadata: {'title': 'bar', 'description': 'foobar'}
        warnings.warn(
    
    -- Docs: https://docs.pytest.org/en/stable/warnings.html
    =========================================================== 1 passed, 2 warnings in 0.03s ============================================================
    

    修改为没有 warning 的代码:

    ...
    
    class FooSchema(Schema):
        name = fields.String(
            required=True,
            metadata={'title': 'foo', 'description': 'foo name'})
        relationship = fields.String(
            metadata={'title': 'bar', 'description': 'foobar'})
    
    

    问题:

    如果有很多个 fields.XXXFieldYYY(...) 代码, 一个一个手动修改起来太难了, 有没有什么快捷的方案一次性改好?

    1 条回复    2021-12-08 15:27:17 +08:00
    SmiteChow
        1
    SmiteChow  
       2021-12-08 15:27:17 +08:00
    有 Monkey patch

    marshmallow/fields.py:218

    的相关逻辑,使其不再执行
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